Chondrosarcoma of scapular spine and acromion. A, Anteroposterior radiograph. B, MR image shows extent of tumor. C, Incision ellipses around biopsy track. D, Osteotomy at base of scapular spine. E, Spine and acromion have been resected. F, Deltoid repaired to trapezius muscle. G, Postoperative radiograph. H and I, Clinical photographs show good shoulder function.